/* SubjectPublicKeyInfo ::= SEQUENCE { * algorithm AlgorithmIdentifier, * subjectPublicKey BIT STRING } */ private ASN1 SubjectPublicKeyInfo() { ASN1 keyInfo = new ASN1(0x30); if (aa is RSA) { keyInfo.Add(PKCS7.AlgorithmIdentifier("1.2.840.113549.1.1.1")); RSAParameters p = (aa as RSA).ExportParameters(false); /* RSAPublicKey ::= SEQUENCE { * modulus INTEGER, -- n * publicExponent INTEGER } -- e */ ASN1 key = new ASN1(0x30); key.Add(ASN1Convert.FromUnsignedBigInteger(p.Modulus)); key.Add(ASN1Convert.FromUnsignedBigInteger(p.Exponent)); keyInfo.Add(new ASN1(UniqueIdentifier(key.GetBytes()))); } else if (aa is DSA) { DSAParameters p = (aa as DSA).ExportParameters(false); /* Dss-Parms ::= SEQUENCE { * p INTEGER, * q INTEGER, * g INTEGER } */ ASN1 param = new ASN1(0x30); param.Add(ASN1Convert.FromUnsignedBigInteger(p.P)); param.Add(ASN1Convert.FromUnsignedBigInteger(p.Q)); param.Add(ASN1Convert.FromUnsignedBigInteger(p.G)); keyInfo.Add(PKCS7.AlgorithmIdentifier("1.2.840.10040.4.1", param)); ASN1 key = keyInfo.Add(new ASN1(0x03)); // DSAPublicKey ::= INTEGER -- public key, y key.Add(ASN1Convert.FromUnsignedBigInteger(p.Y)); } else { throw new NotSupportedException("Unknown Asymmetric Algorithm " + aa.ToString()); } return(keyInfo); }
/* * RSAPrivateKey ::= SEQUENCE { * version Version, * modulus INTEGER, -- n * publicExponent INTEGER, -- e * privateExponent INTEGER, -- d * prime1 INTEGER, -- p * prime2 INTEGER, -- q * exponent1 INTEGER, -- d mod (p-1) * exponent2 INTEGER, -- d mod (q-1) * coefficient INTEGER, -- (inverse of q) mod p * otherPrimeInfos OtherPrimeInfos OPTIONAL * } */ static public byte[] Encode(RSA rsa) { RSAParameters param = rsa.ExportParameters(true); ASN1 rsaPrivateKey = new ASN1(0x30); rsaPrivateKey.Add(new ASN1(0x02, new byte [1] { 0x00 })); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Modulus)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Exponent)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.D)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.P)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.Q)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.DP)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.DQ)); rsaPrivateKey.Add(ASN1Convert.FromUnsignedBigInteger(param.InverseQ)); return(rsaPrivateKey.GetBytes()); }
static public byte[] Encode(DSA dsa) { DSAParameters param = dsa.ExportParameters(true); return(ASN1Convert.FromUnsignedBigInteger(param.X).GetBytes()); }